package com.bwie.config;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.concurrent.TimeUnit;

/**
 * @projectName: server-2211a-red
 * @package: com.bwie.config
 * @className: MyGlobalConfig
 * @author: 杨珂
 * @description: TODO
 * @date: 2025/6/7 10:05
 * @version: 1.0
 */

@Configuration
@Order(-1)
public class MyGlobalConfig implements GlobalFilter {

    @Autowired
    StringRedisTemplate redisTemplate;

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {


        //获取请求参数
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String url = request.getURI().getPath();
        System.out.println("请求路径：" + url);

        //设置白名单
        if (url.contains("/login")) {
            return chain.filter(exchange);
        }
        if (url.contains("/sendCode/")) {
            return chain.filter(exchange);
        }

        //校验token
        String token = request.getHeaders().getFirst("token");
        if (token == null) {
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }


        Claims body = Jwts.parser().setSigningKey("123456").parseClaimsJws(token).getBody();
        Integer userId = body.get("userId", Integer.class);

        String tokenKey = "token-" + userId;
        String redisToken = redisTemplate.opsForValue().get(tokenKey);
        if (redisToken == null) {
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        if (!redisToken.equals(token)) {
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        //token 续期

        redisTemplate.expire(tokenKey, 30, TimeUnit.MINUTES);

        return chain.filter(exchange);
    }
}
